Development of feeding practices during the first 5 years of life.

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Abstract
HUMAN INFANTS in the United States consume breast milk or infant formula for varying periods, usually continuing after the introduction of solid foods. The feeding of infants can be divided into 3 overlapping periods: (1) a nursing or suckling period; (2) a transitional period when solid foods are introduced to supplement breast milk or formula; and (3) a modified adult period, when most nutrients are derived from solid food.1,2 The transitional period typically begins at 4 to 6 months of age,3 corresponding to the introduction of solid foods, and continues until the infant is fully weaned from the breast or bottle.